OF ARTS AND SCIENCES : JANUARY 26, 1870. 161 



18. E. marifoliuh, n. sp. Modo E. umbellati ramis sterilibus de- 

 pressis gracilibus substoloniformibus laxe casspitosis ; foliis parvis ovatis 

 utrinque albo-toraentosis vel supra mox glabratis basi rotundatis aut 

 abrupte in petiolum laminam (3-5 lin. longain) srepius excedentem an- 

 gustatis ; umbella 3 - 6-radiata nunc capituliformi in scapo nudo; in- 

 volucris parvis; floribus luteis (interdum roseo tinctis) ; semine lanceo- 

 lato ; embryone recto axili, cotyledonibus obovato-oblongis radicula 

 longioribus! — California, Lobb. no. 192 in herb. Hook. Mount Shasta, 

 7-9,000 feet, Brewer: involucres apparently with only male flowers, 

 more or less capitate on a scape only an inch or two long. High 

 mountain near Donner's Pass, Sierra Nevada, Torrey : apparently male 

 flowers in contracted umbels on scapes from two to five inches high ; 

 and fruiting plants with scapes eight or ten inches high, bearing an 

 umbel of five or six long rays besides the sessile central involucre. 

 The involucres are only a„line or a line and a half long; the perigonia 

 of about the same length, or those with mature fruit accrescent, espe- 

 cially the inner ones, and as much as two and a half lines long. 



19. E. incanum, n. sp. Densius caaspitosum ; caudicibus crassioribus; 

 foliis creberrimis oblongis spathulatisve utrincpie cano-tomentosis in pe- 

 tiolum lamina (semipollicari) haud longiorem angustatis ; scapo nudo ; 

 umbella prajter involucrum centrale sessile 5 - 7-radiata nunc capitu- 

 liformi rariusve ad involucrum solitarium reducta; floribus flavis; 

 semine ovato acuminato ; embryone rectiusculo, cotyledonibus ovali- 

 rotundis parura excentricis radicular aequilongis. — California, in the 

 Sierra Nevada, Brewer (on the Tuolumne River, alt. 8-11,000 feet), 

 Torrey, Bolander. Much more densely casspitose than the foregoing; 

 the scapes from two to six inches high and less slender ; the flowers simi- 

 lar but bright yellow, about a line long, but the accrescent fructiferous 

 perigonium in Bolander's fine specimens from two and a half to three 

 lines long. Involucre with five to seven short and broad erect teeth. 



§ 4. Psetjdo-Umbellata. Flos basi abrupte constricta brevissima 

 cum pedicello articulatus. Involucra umbellata, rarissime soli- 

 taria, multiflora: umbella bracteis foliaceis involucrantibus sub- 

 tensa, scapum nudum (interdum unifoliatum) terminans. Perigo- 

 nium 6-partitum, albidum seu luteolum, nee flavum ; segmentis 

 obovatis fere conformibus. Ovarium totum vel basi glabrum. 

 Embryo uti notus praecedentium. — Herbce perennes, casspitosae, 

 humiles, floribus ut videtur luteolis seu albidis extus aut laxe 

 pilosis aut glabris. 



VOL. VIII. 21 



